Question

A certain number of people can complete a work in 12 days working 5 hours a day. If the number of men is decreased by half, the
number of days taken increases to 15 days. How many hours a day would they have worked to achieve the above?
Select one:
a.9
O b.8
O c. 10
O d. 6​

Answer 1

Answer:

b)8

8 is the correct answer to this question.

Plz mark me the brainliast.

Answer 2

Answer:

A certain number of people can complete a work in 12 days working 6 hours a day.

let m = that "certain no. of people

Find the the man-hrs to complete the job

12*6*m = 72m man-hrs

:

If the number of men decreased to one-third, the number of days taken increases to 24 days.

How many hours a day would they have worked to achieve the above?

let h = no. of hrs to accomplish this using this scenario

m%2F3 * 24 * h = 72m

8*m*h = 72m

divide both sides by m

8h = 72

h = 72/8

h = 9 hrs a day required

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